refactor(gui): ✨ Enhance type annotations and improve method signatures

* Updated type hints for various methods in  and  classes.
* Changed list types from  to  for better clarity and consistency.
* Improved function signatures to include return types for better type safety.

2 files changed, 49 insertions, 49 deletions

diff --git a/tidal_dl_ng/download.py b/tidal_dl_ng/download.py
index 9b13053..34d3ef5 100644
--- a/tidal_dl_ng/download.py
+++ b/tidal_dl_ng/download.py
@@ -57,7 +57,7 @@ from tidal_dl_ng.model.gui_data import ProgressBars
 class RequestsClient:
     def download(
         self, uri: str, timeout: int = REQUESTS_TIMEOUT_SEC, headers: dict | None = None, verify_ssl: bool = True
-    ):
+    ) -> tuple[str, str]:
         if not headers:
             headers = {}
 
@@ -84,12 +84,12 @@ class Download:
         path_base: str,
         fn_logger: Callable,
         skip_existing: bool = False,
-        progress_gui: ProgressBars = None,
-        progress: Progress = None,
-        progress_overall: Progress = None,
-        event_abort: Event = None,
-        event_run: Event = None,
-    ):
+        progress_gui: ProgressBars | None = None,
+        progress: Progress | None = None,
+        progress_overall: Progress | None = None,
+        event_abort: Event | None = None,
+        event_run: Event | None = None,
+    ) -> None:
         self.settings = Settings()
         self.session = session
         self.skip_existing = skip_existing
@@ -118,12 +118,12 @@ class Download:
         media: Track | Video,
         path_file: pathlib.Path,
         stream_manifest: StreamManifest | None = None,
-    ) -> (bool, pathlib.Path):
+    ) -> tuple[bool, pathlib.Path]:
         media_name: str = name_builder_item(media)
-        urls: [str]
+        urls: list[str]
         path_base: pathlib.Path = path_file.parent
         result_segments: bool = True
-        dl_segment_results: [DownloadSegmentResult] = []
+        dl_segment_results: list[DownloadSegmentResult] = []
         result_merge: bool = False
 
         # Get urls for media.
@@ -179,7 +179,7 @@ class Download:
                 max_workers=self.settings.data.downloads_simultaneous_per_track_max
             ) as executor:
                 # Dispatch all download tasks to worker threads
-                l_futures: [futures.Future] = [
+                l_futures: list[futures.Future] = [
                     executor.submit(self._download_segment, url, path_base, block_size, p_task, progress_to_stdout)
                     for url in urls
                 ]
@@ -225,7 +225,7 @@ class Download:
 
         return result_merge, tmp_path_file_decrypted
 
-    def _segments_merge(self, path_file, dl_segment_results) -> bool:
+    def _segments_merge(self, path_file: pathlib.Path, dl_segment_results: list[DownloadSegmentResult]) -> bool:
         result: bool = True
 
         # Copy the content of all segments into one file.
@@ -298,7 +298,7 @@ class Download:
         )
 
     def extension_guess(
-        self, quality_audio: Quality, metadata_tags: [str], is_video: bool
+        self, quality_audio: Quality, metadata_tags: list[str], is_video: bool
     ) -> AudioExtensions | VideoExtensions:
         result: AudioExtensions | VideoExtensions
 
@@ -321,9 +321,9 @@ class Download:
     def item(
         self,
         file_template: str,
-        media: Track | Video = None,
-        media_id: str = None,
-        media_type: MediaType = None,
+        media: Track | Video | None = None,
+        media_id: str | None = None,
+        media_type: MediaType | None = None,
         video_download: bool = True,
         download_delay: bool = False,
         quality_audio: Quality | None = None,
@@ -331,7 +331,7 @@ class Download:
         is_parent_album: bool = False,
         list_position: int = 0,
         list_total: int = 0,
-    ) -> (bool, pathlib.Path):
+    ) -> tuple[bool, pathlib.Path | str]:
         try:
             if media_id and media_type:
                 # If no media instance is provided, we need to create the media instance.
@@ -557,14 +557,14 @@ class Download:
 
         return path_media_dst
 
-    def adjust_quality_audio(self, quality) -> Quality:
+    def adjust_quality_audio(self, quality: Quality) -> Quality:
         # Save original quality settings
         quality_old: Quality = self.session.audio_quality
         self.session.audio_quality = quality
 
         return quality_old
 
-    def adjust_quality_video(self, quality) -> QualityVideo:
+    def adjust_quality_video(self, quality: QualityVideo) -> QualityVideo:
         quality_old: QualityVideo = self.settings.data.quality_video
 
         self.settings.data.quality_video = quality
@@ -618,7 +618,7 @@ class Download:
         return result
 
     @staticmethod
-    def cover_data(url: str = None, path_file: str = None) -> str | bytes:
+    def cover_data(url: str | None = None, path_file: str | None = None) -> str | bytes:
         result: str | bytes = ""
 
         if url:
@@ -642,7 +642,7 @@ class Download:
 
     def metadata_write(
         self, track: Track, path_media: pathlib.Path, is_parent_album: bool, media_stream: Stream
-    ) -> (bool, pathlib.Path | None, pathlib.Path | None):
+    ) -> tuple[bool, pathlib.Path | None, pathlib.Path | None]:
         result: bool = False
         path_lyrics: pathlib.Path | None = None
         path_cover: pathlib.Path | None = None
@@ -713,14 +713,14 @@ class Download:
     def items(
         self,
         file_template: str,
-        media: Album | Playlist | UserPlaylist | Mix = None,
-        media_id: str = None,
-        media_type: MediaType = None,
+        media: Album | Playlist | UserPlaylist | Mix | None = None,
+        media_id: str | None = None,
+        media_type: MediaType | None = None,
         video_download: bool = False,
         download_delay: bool = True,
         quality_audio: Quality | None = None,
         quality_video: QualityVideo | None = None,
-    ):
+    ) -> None:
         try:
             if media_id and media_type:
                 # If no media instance is provided, we need to create the media instance.
@@ -765,14 +765,14 @@ class Download:
         is_album: bool = isinstance(media, Album)
         # TODO: Refactor strings to constants (also in cfg.py)
         sort_by_track_num: bool = bool("album_track_num" in file_name_relative or "list_pos" in file_name_relative)
-        result_dirs: [pathlib.Path] = []
+        result_dirs: list[pathlib.Path] = []
         list_total: int = len(items)
 
         # Iterate through list items
         while not progress.finished:
             with futures.ThreadPoolExecutor(max_workers=self.settings.data.downloads_concurrent_max) as executor:
                 # Dispatch all download tasks to worker threads
-                l_futures: [futures.Future] = [
+                l_futures: list[futures.Future] = [
                     executor.submit(
                         self.item,
                         media=item_media,
@@ -817,9 +817,9 @@ class Download:
         self.fn_logger.info(f"Finished list '{list_media_name}'.")
 
     def playlist_populate(
-        self, dirs_scoped: [pathlib.Path], name_list: str, is_album: bool, sort_alphabetically
-    ) -> [pathlib.Path]:
-        result: [pathlib.Path] = []
+        self, dirs_scoped: set[pathlib.Path], name_list: str, is_album: bool, sort_alphabetically: bool
+    ) -> list[pathlib.Path]:
+        result: list[pathlib.Path] = []
 
         # For each dir, which contains tracks
         for dir_scoped in dirs_scoped:
@@ -830,7 +830,7 @@ class Download:
             self.fn_logger.debug(f"Playlist: Creating {path_playlist}")
 
             # Get all tracks in the directory
-            path_tracks: [pathlib.Path] = []
+            path_tracks: list[pathlib.Path] = []
 
             for extension_audio in AudioExtensions:
                 path_tracks = path_tracks + list(dir_scoped.glob(f"*{extension_audio!s}"))
@@ -889,7 +889,7 @@ class Download:
 
         return path_media_out
 
-    def _extract_video_stream(self, m3u8_variant: m3u8.M3U8, quality: int) -> (m3u8.M3U8 | bool, str):
+    def _extract_video_stream(self, m3u8_variant: m3u8.M3U8, quality: int) -> tuple[m3u8.M3U8 | bool, str]:
         m3u8_playlist: m3u8.M3U8 | bool = False
         resolution_best: int = 0
         mime_type: str = ""
diff --git a/tidal_dl_ng/gui.py b/tidal_dl_ng/gui.py
index 57613f5..80dc07e 100644
--- a/tidal_dl_ng/gui.py
+++ b/tidal_dl_ng/gui.py
@@ -326,7 +326,7 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
     def handle_filter_activated(self) -> None:
         """Handle activation of filter headers in the results tree."""
         header = self.tr_results.header()
-        filters: list[str] = []
+        filters: list[tuple[int, str]] = []
         for i in range(header.count()):
             text: str = header.filter_text(i)
 
@@ -369,7 +369,7 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
         Args:
             model (QStandardItemModel): The model to initialize.
         """
-        labels_column: [str] = ["#", "obj", "Artist", "Title", "Album", "Duration", "Quality", "Date"]
+        labels_column: list[str] = ["#", "obj", "Artist", "Title", "Album", "Duration", "Quality", "Date"]
 
         model.setColumnCount(len(labels_column))
         model.setRowCount(0)
@@ -404,7 +404,7 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
         """Populate the user lists tree with playlists, mixes, and favorites.
 
         Args:
-            user_lists (list): List of user playlists, mixes, and favorites.
+            user_lists (list[Playlist | UserPlaylist | Mix]): List of user playlists, mixes, and favorites.
         """
         twi_playlists: QtWidgets.QTreeWidgetItem = self.tr_lists_user.findItems(
             TidalLists.Playlists, QtCore.Qt.MatchExactly, 0
@@ -612,7 +612,7 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
         """Download all media items in a selected list.
 
         Args:
-            point (QPoint, optional): The point in the tree. Defaults to None.
+            point (QPoint | None, optional): The point in the tree. Defaults to None.
         """
         items: list[QtWidgets.QTreeWidgetItem] = []
 
@@ -733,12 +733,12 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
         self.apply_settings(self.settings)
         self._init_dl()
 
-    def search(self, query: str, types_media: Any) -> list[ResultItem]:
+    def search(self, query: str, types_media: list[Any]) -> list[ResultItem]:
         """Perform a search and return a list of ResultItems.
 
         Args:
             query (str): The search query.
-            types_media (SearchTypes): The types of media to search for.
+            types_media (list[Any]): The types of media to search for.
 
         Returns:
             list[ResultItem]: The search results.
@@ -759,7 +759,7 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
 
             result_search = {"direct": [media]}
         else:
-            result_search: dict[str, [SearchTypes]] = search_results_all(
+            result_search: dict[str, list[SearchTypes]] = search_results_all(
                 session=self.tidal.session, needle=query, types_media=types_media
             )
 
@@ -780,7 +780,7 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
         Returns:
             list[ResultItem]: List of ResultItem models.
         """
-        result = []
+        result: list[ResultItem] = []
 
         for idx, item in enumerate(items):
             result_item = self._to_result_item(idx, item)
@@ -1288,16 +1288,16 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
         self,
         media_list: Album | Playlist | Mix | Artist | None = None,
         point: QtCore.QPoint | None = None,
-        parent: QtGui.QStandardItem = None,
-        favorite_function: Callable = None,
+        parent: QtGui.QStandardItem | None = None,
+        favorite_function: Callable | None = None,
     ) -> None:
         """Populate the results tree with the items of a media list.
 
         Args:
             media_list (Album | Playlist | Mix | Artist | None, optional): The media list to show. Defaults to None.
             point (QPoint | None, optional): The point in the tree. Defaults to None.
-            parent (QStandardItem, optional): Parent item for nested results. Defaults to None.
-            favorite_function (Callable, optional): Function to fetch favorite items. Defaults to None.
+            parent (QStandardItem | None, optional): Parent item for nested results. Defaults to None.
+            favorite_function (Callable | None, optional): Function to fetch favorite items. Defaults to None.
         """
         if point:
             item = self.tr_lists_user.itemAt(point)
@@ -1308,9 +1308,9 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
             if isinstance(media_list, str):
                 favorite_function = favorite_function_factory(self.tidal, media_list)
 
-            media_items: [Track | Video | Album] = favorite_function()
+            media_items: list[Track | Video | Album] = favorite_function()
         else:
-            media_items: [Track | Video | Album] = items_results_all(media_list)
+            media_items: list[Track | Video | Album] = items_results_all(media_list)
 
         result: list[ResultItem] = self.search_result_to_model(media_items)
 
@@ -1346,7 +1346,7 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
         Args:
             regex (str): Regular expression to match items.
         """
-        items: [QtWidgets.QTreeWidgetItem | None] = self.tr_queue_download.findItems(
+        items: list[QtWidgets.QTreeWidgetItem | None] = self.tr_queue_download.findItems(
             regex, QtCore.Qt.MatchFlag.MatchRegularExpression, column=0
         )
 
@@ -1355,7 +1355,7 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
 
     def on_queue_download_remove(self) -> None:
         """Remove selected items from the download queue."""
-        items: [QtWidgets.QTreeWidgetItem | None] = self.tr_queue_download.selectedItems()
+        items: list[QtWidgets.QTreeWidgetItem | None] = self.tr_queue_download.selectedItems()
 
         if len(items) == 0:
             logger_gui.error("Please select an item from the queue first.")
@@ -1439,7 +1439,7 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
         handling_app: HandlingApp = HandlingApp()
 
         while not handling_app.event_abort.is_set():
-            items: [QtWidgets.QTreeWidgetItem | None] = self.tr_queue_download.findItems(
+            items: list[QtWidgets.QTreeWidgetItem | None] = self.tr_queue_download.findItems(
                 QueueDownloadStatus.Waiting, QtCore.Qt.MatchFlag.MatchExactly, column=0
             )